Ellagic Acid Prevents Ca2+ Dysregulation and Improves Functional Abnormalities of Ventricular Myocytes via Attenuation of Oxidative Stress in Pathological Cardiac Hypertrophy
| العنوان: | Ellagic Acid Prevents Ca2+ Dysregulation and Improves Functional Abnormalities of Ventricular Myocytes via Attenuation of Oxidative Stress in Pathological Cardiac Hypertrophy |
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| المؤلفون: | Bilge Eren Yamasan, Semir Ozdemir, Tanju Mercan, O. Erkan |
| المصدر: | Cardiovascular Toxicology. 21:630-641 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Diminution, chemistry.chemical_classification, medicine.medical_specialty, Reactive oxygen species, biology, Chemistry, Diastole, 030204 cardiovascular system & hematology, Toxicology, medicine.disease_cause, 03 medical and health sciences, 0302 clinical medicine, Endocrinology, 030220 oncology & carcinogenesis, Internal medicine, medicine, biology.protein, Myocyte, P22phox, Cardiology and Cardiovascular Medicine, Molecular Biology, Oxidative stress, Homeostasis, Intracellular |
| الوصف: | The aim of this study was to investigate whether ellagic acid (EA) treatment can prevent changes in contractile function and Ca2+ regulation of cardiomyocytes in pathologic cardiac hypertrophy. Groups were assigned as Con group; an ISO group in which the rats received isoproterenol alone (5 mg/kg/day); and an ISO + EA group in which the rats received isoproterenol and EA (20 mg/kg/day) for 4 weeks. Subsequently, fractional shortening, intracellular Ca2+ signals, and L-type Ca2+ currents of isolated ventricular myocytes were recorded. Protein expression levels were also determined by the Western blotting method. The survival rate was increased, and the upregulated cardiac hypertrophy markers were significantly attenuated with the EA treatment. The fractional shortening and relaxation rate of myocytes was decreased in the ISO group, whereas EA significantly improved these changes. Ventricular myocytes of the ISO + EA rats displayed lower diastolic Ca2+ levels, higher Ca2+ transients, shorter Ca2+ decay, and higher L-type Ca2+ currents than those of ISO rats. Protein expression analyses indicated that the upregulated p-PLB and p-CaMKII expressions were restored by EA treatment, suggesting improved calcium handling in the ISO + EA rat heart. Moreover, ISO rats displayed significantly increased expression of p-22phox and p47phox subunits of NOX2 protein. Expression of the p22phox subunit was reduced with EA administration, while the decrease in p47phox did not reach a significant level. The increased ROS impairs Ca2+ homeostasis and contractile activity of cardiac myocytes, whereas chronic EA administration prevents Ca2+ dysregulation and functional abnormalities associated with pathological cardiac hypertrophy via the diminution of oxidative stress. |
| تدمد: | 1559-0259 1530-7905 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::9099a0962128c07c31b94566c3487696Test https://doi.org/10.1007/s12012-021-09654-1Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........9099a0962128c07c31b94566c3487696 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15590259 15307905 |
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